Did a 2 week holiday in Majorca flying with British Airtours, outbound on saturday morning had choice of three flights, 0700, 0730 or 0830. Picked 0830 and arrived at LGW to find 0700 and 0730 on time but 0830 departing at 1630. Taken away on a bus for lunch at a hotel and departed about 1630.
Return flight was at 1230 and on arriving to check in noticed that British Airtours were checking in the two earlier return flights but our flight didn't even have an arrival time. Found a rep and asked what the problem was, told that our flight wasn't due to arrive at Majorca until 0400 next morning and that a few passengers would be put on any empty space on the two other flights everyone esle would be "looked after". Decided to take a chance and gathering the wife and kids went and checked in on one of the earlier flights, given boarding passes without any comment whatsoever and spent an hour worrying if we would be dumped before the flight left..
Surprising I kept a watch on the flight number ,on ceefax,for the rest of the summer and that Majorca flight was always between 8 and 18 hours late every saturday.